transformer mounted at 10' above panel

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PCBERRY

Member
an electrical inspector is requiring a panelboard which is wall mounted be brought out to within 6 iches of the face of a transformer which serves this low side panel which is hung at 10 above the floor

Where is this interpretation to be found in the NEC ?
 

480sparky

Senior Member
Location
Iowegia
If memory serves, it's not in the '08. I recall this once being a requirement, but it caused so many problems as it forced the front faces of all electrical equipment to be brought out to the same plane.

Image several 4" panels, 20" MDP, 24" MCC and a 30" transformer on a wall. The requirement said the front faces were all to be on the same plane. Made installing switchgear a royal PITA.

So I think it got removed, but I can't locate it in any of the older codes.

Any easy way to find it is to ask the inspector for a Code reference.
 
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A/A Fuel GTX

Senior Member
Location
WI & AZ
Occupation
Electrician
Ask your inspector for a code reference. I'm thinking he'll quote something from 110.26 but I sure can't find anything if I'm interpreting your question properly.
 

charlie b

Moderator
Staff member
Location
Lockport, IL
Occupation
Semi-Retired Electrical Engineer
The inspector is misinterpreting 110.26(A)(3), by ignoring the phrase, "Within the height requirements of this section." Your transformer does not interfere with the height requirements, so the 6" rule does not apply.
 

edavis2293

Member
Location
Houston, Texas
XFMR / Panel

XFMR / Panel

The inspector may be going by 110-26(F)(1). If the panel is located indoors, then the area above the panel to a height of 6' above the panel must be clear. This article list panelbaords specifically and doesn't permit the 6" rule in 110-26(A)(3) either.
 

raider1

Senior Member
Staff member
Location
Logan, Utah
The inspector may be going by 110-26(F)(1). If the panel is located indoors, then the area above the panel to a height of 6' above the panel must be clear. This article list panelbaords specifically and doesn't permit the 6" rule in 110-26(A)(3) either.

I don't agree that 110.26(F)(1) prohibits a transformer from being installed in the dedicated space above a panel. The dedicated space is for the "electrical installation" of which the transformer would be an integral part.

Chris
 

dcspector

Senior Member
Location
Burke, Virginia
The inspector is misinterpreting 110.26(A)(3), by ignoring the phrase, "Within the height requirements of this section." Your transformer does not interfere with the height requirements, so the 6" rule does not apply.


Agreed along with edavis2293's post. 110.26(A)(3) is what I was looking at with Charlie b
 
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cowboyjwc

Moderator
Staff member
Location
Simi Valley, CA
I don't agree that 110.26(F)(1) prohibits a transformer from being installed in the dedicated space above a panel. The dedicated space is for the "electrical installation" of which the transformer would be an integral part.

Chris

I would agree with Chris. You see it all the time in plants where floor space is at a premium.
 

infinity

Moderator
Staff member
Location
New Jersey
Occupation
Journeyman Electrician
I don't agree that 110.26(F)(1) prohibits a transformer from being installed in the dedicated space above a panel. The dedicated space is for the "electrical installation" of which the transformer would be an integral part.

Chris

I agree also. This installation would not violate the dedicated space or working space requirements for the panel.
 
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